How many copies did FPS Chess sell?

1.1M to 1.8M copies, based on its 44k Steam reviews. This is a labeled estimate from the review count, not exact sales.

How much revenue did FPS Chess make?

FPS Chess is free to play, so there is no copy-sales revenue to estimate.

How big is FPS Chess?

Estimated owners: ≈ 1.1M–1.8M; from 44k reviews (Very Positive)

A labeled estimate from the public review count (adjusted for release year), not exact sales. Owner data cross-checked with SteamSpy.

Does this actually work?

We left FPS Chess out and predicted the genre from its 8 similar games. Every figure here, including FPS Chess's, is estimated from Steam reviews, not self-reported sales.

Copies, estimated from reviews

typical (middle half) 39.9M–90.3M

best case 813.7M (Counter-Strike 2)

Games like FPS Chess

The middle of these games

≈ 39.9M–90.3M copies

≈ $518.1M–$745.9M after Steam's cut

from ~1.2M reviews

Only the top fifth of 2019’s Steam releases earned about $34k gross, so plan for that or less.

All 8 of your similar games are hits.

Best case: Counter-Strike 2 at ≈ 620.0M–1007.5M copies. A breakout hit, far above a typical game.

The genre you'd be entering

Your set: Your set clusters on FPS (5 of 8) and Shooter (4 of 8).
The winners: Winners here lead with Shooter + FPS. The breakout hits carry Action + Shooter + FPS; a typical game here doesn't.
The era: The games you compared span 2006 to 2020, and none of them shipped in the last two years.

How these numbers were worked out

A hit here: 1,000+ reviews, roughly $150k+ before Steam's cut (a standard indie benchmark).

Copies come from each game's reviews times a sales-per-review rate that falls with release age, from about 31 for the most recent game here to about 79 for the oldest, then widened into a range; revenue rides on that estimate times price. Source: GameDiscoverCo (2020) and VG Insights (2021).

Similar games

Game	Est. copies	Est. revenue	Price	Reviews	Tags
PUBG: BATTLEGROUNDS 2017	Est. copies ≈ 94.5M–153.6M 2.4x vs typical SteamSpy 100M–200M	Est. revenue Free	Free	2.7M reviews Mixed	SurvivalShooter
Tom Clancy's Rainbow Six Siege 2015	Est. copies ≈ 75.3M–122.4M SteamSpy 20M–50M	Est. revenue Free	Free	1.5M reviews Very Positive	FPSPvP
Counter-Strike 2 2012	Est. copies ≈ 620.0M–1007.5M 8.4x vs typical SteamSpy 100M–200M	Est. revenue Free	Free	9.8M reviews Very Positive	FPSShooter
Apex Legends™ 2020	Est. copies ≈ 26.4M–43.0M SteamSpy 100M–200M	Est. revenue Free	Free	1.1M reviews Mixed	Free to PlayBattle Royale
Destiny 2 2019	Est. copies ≈ 19.0M–30.9M SteamSpy 20M–50M	Est. revenue Free	Free	661k reviews Mostly Positive	Free to PlayOpen World
Garry's Mod 2006	Est. copies ≈ 79.8M–129.6M SteamSpy 20M–50M	Est. revenue $219.1M–$589.2M after Steam's cut $398.4M–$906.5M before the cut	$9.99	1.3M reviews Overwhelmingly Positive	SandboxModdable
Rust 2018	Est. copies ≈ 42.4M–68.9M SteamSpy 20M–50M	Est. revenue $466.2M–$1253.5M after Steam's cut $847.6M–$1928.4M before the cut	$39.99	1.4M reviews Very Positive	SurvivalCrafting
War Thunder 2013	Est. copies ≈ 49.3M–80.1M SteamSpy 20M–50M	Est. revenue Free	Free	780k reviews Mostly Positive	Free to PlaySimulation